“Our interest stemmed from the fact that a pretty young woman entered Westminster Abbey as a sister of a bride, and emerged as a global phenomenon in the space of an hour,” the film’s executive producer, David Notman-Watt, said at the time. “It was literally within minutes of her appearing holding Kate’s train, Twitter went crazy, Facebook went crazy.”

Middleton’s plea for privacy was sent to the agencies by the British law firm Harbottle and Lewis, which also represents Middleton’s sister, Kate, and Prince Willliam, and William’s father, Prince Charles, the Mail reports.

The legal backing for Middleton’s request appears to come from a section of the Protection From Harassment Act 1997 that was enacted in England shortly before the death of Princess Diana, who was known as “the most photographed woman in the world” and who died in a car crash while being chased by paparazzi.

The letter cites Section 1 of the law that says “a person must not pursue a course of conduct which amounts to harassment of another and which he knows or ought to know amounts to harassment of the other,” according to the Mail.

Harbottle and Lewis did not comment on the letter, while St. James’s Palace, which represents Kate and Prince William, told the Mail they did not represent or act for Middleton.